Day 11 string class more

public class Day11A {
    public static void main(String[] args) {
        // Day11A callMe = new Day11A();
        char chABC = 't';
        String txtRef = "The quick brown fox jumps over the lazy dog";
        printLetterCount(chABC, txtRef);
        for (char ch1 = 'a'; ch1 <= 'z';ch1++){
            System.out.println(ch1);
        }
    }

    static void printLetterCount(char chFind, String txtSample) {
        int letterCount = 0;
        int nextIndex = 0;
        int charCount = 0;
        for (int i = 0; i < txtSample.length(); i++) {
            nextIndex = txtSample.toLowerCase().indexOf(chFind,i);
            i = nextIndex;
            if (i == -1) {
                break;
            }
            charCount++;
        }
        System.out.println(chFind + " : " + charCount);
    }
}


//---------------------------------
public class Day11B {
    public static void main(String[] args) {
        String practiceText = "Username;Identifier;First name;Last name";

        String[] resultArray = practiceText.split(";");

        for (String string : resultArray) {
            System.out.print(string + "   | ");
        }
        System.out.println();

        String[] csvSample = { "booker12;9012;Rachel;Booker"
            ,"grey07;2070;Laura;Grey"
            ,"johnson81;4081;Craig;Johnson"
            ,"jenkins46;9346;Mary;Jenkins"
            ,"smith79;5079;Jamie;Smith"};

        for (String csvString : csvSample) {
            String[] csvToArray = csvString.split(";");
            for (String string : csvToArray) {
                System.out.print(string + "   | ");
            }
            System.out.println();
        }
    }

}

//---------------------------------

public class Day11D {
    public static void main(String[] args) {
        String name = "Terry";
        String hobby = "Plastic Model Making";
        byte age = 12;
        String resultMessage;
        resultMessage = String.format("Good day I’m %s age %d", name, age);
        System.out.println(resultMessage);
        resultMessage = String.format("My hobbies are %s", hobby);
        System.out.println(resultMessage);

        String txtCSV = "Username;Identifier;First name;Last name";
        String[] csvArray = txtCSV.split(";");

        System.out.printf("%-12s | %-10s | %-12s | %-12s |%n"
                ,csvArray[0],csvArray[1],csvArray[2],csvArray[3]);

        txtCSV = "jenkins46;9346;Mary;Jenkins";
        csvArray = txtCSV.split(";");

        System.out.printf("%-12s | %-10s | %-12s | %-12s |%n"
                ,csvArray[0],csvArray[1],csvArray[2],csvArray[3]);

        String[] csvSample = { "booker12;9012;Rachel;Booker"
            ,"grey07;2070;Laura;Grey"
            ,"johnson81;4081;Craig;Johnson"
            ,"smith79;5079;Jamie;Smith"};
    }
}
//---------------------------------